Optical element rotating device and stage light optical device

Abstract

The present invention provides an optical element rotating device, which is simple in structure and convenient in use, and can prevent the stuck phenomenon of the rotating motion of the optical element main body from affecting the using effect of the stage light, comprising a base body, a ball holder, a ball, a ball pressing plate, an elastic element, and a cover, wherein the ball holder is sleeved outside the periphery of the base body; and the ball, the ball pressing plate, the elastic element and the cover are sequentially positioned between the ball holder and the base body from bottom to top. A stage light optical device is also disclosed, comprising an optical element main body and the rotating device, wherein the optical element main body is positioned on the base body of the rotating device.

What is claimed is: 
     
       1. An optical element rotating device, comprising:
 a base body, 
 a ball holder, 
 a ball, 
 a ball pressing plate, 
 an elastic element, and 
 a cover, 
 wherein the ball holder is sleeved on the base body; and the ball, the ball pressing plate, the elastic element and the cover are sequentially positioned between the ball holder and the base body from bottom to top, 
 wherein a first ball groove is arranged at a position, corresponding to the ball, on a peripheral sidewall of the base body. 
 
     
     
       2. The optical element rotating device according to  claim 1 ,
 wherein a first arc gap is arranged at a position, corresponding to the ball, on an inner side of the ball holder, 
 wherein a second arc gap is arranged on the ball pressing plate corresponding to the ball, 
 wherein the first arc gap and the second arc gap constitute a second ball groove, and 
 wherein the ball is positioned between the first ball groove and the second ball groove. 
 
     
     
       3. The optical element rotating device according to  claim 1 ,
 wherein a pressing plate groove and a cover groove are respectively arranged at a position on the inner side of the ball holder, corresponding to the ball pressing plate and the cover, 
 wherein the ball pressing plate is positioned in the pressing plate groove of the ball holder, a vertical height of the pressing plate groove is larger than a vertical height of the ball pressing plate, and 
 wherein the cover is embedded in the cover groove of the ball holder. 
 
     
     
       4. The optical element rotating device according to  claim 3 , wherein the elastic element is positioned between the ball pressing plate and the cover, and both sides of the elastic element are respectively in close contact with the ball pressing plate and the cover. 
     
     
       5. The optical element rotating device according to  claim 4 , wherein the elastic element is an elastic washer, a rubber ring, a wave washer, or a spring. 
     
     
       6. The optical element rotating device according to  claim 1 , wherein the cover is provided with a slit and the cover has slight elasticity. 
     
     
       7. The optical element rotating device according to  claim 1 , wherein the ball pressing plate, the elastic element, and the cover are all in annular shape. 
     
     
       8. The optical element rotating device according to  claim 1 , wherein when the ball expands with heat generated by the optical element, the ball applies a first force to the ball pressing plate which will apply a second force to the elastic element that is then compressed by the ball pressing plate and the cover, so that the position between the ball and the base body is adjusted through the adjustment of the elastic element; and
 wherein when the ball contracts with cold as the optical element is not in operation, the elastic element releases elastic force and applies a third force to the ball pressing plate, so that the ball pressing plate applies a fourth force to the ball and compresses the ball. 
 
     
     
       9. A stage light optical device, comprising an optical element main body and the optical element rotating device according to  claim 1 , wherein the optical element main body is positioned on the base body of the optical element rotating device. 
     
     
       10. The stage light optical device according to  claim 9 , wherein the optical element main body is a pattern assembly or a prism assembly.